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TIL the phrase "Blowing Smoke Up Your Ass" used to be literal. The practice was thought to revive people who were passed out or drowned. Equipment for the procedure was placed near waterways just as defibrillators are today.

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JYOdk TIL that the can opener was invented 40 years after the can.
G585 TIL that India has one of the world’s only No First Use (NFU) nuclear doctrines, which dictates that India will only deploy nuclear weapons in the event of a nuclear attack on India occurring first. Pakistan has an active first use nuclear policy.
epMB5 TIL the closest living relatives of the Muskox are sheep and goats
Rdxj TIL Sony’s PlayStation 4 Costs $381 to Manufacture
ZLMp TIL that to avoid facial wrinkles, a woman claims to have not smiled or laughed for 40 years, even after the birth of her daughter